I think he's the greatest Jedi because he runs through the heat of battle smiling. He easily outclasses the rest of the Jedi. And no, he doesn't cut his own head off. I was going to include a couple of frames of the next shot, where he is seen falling b

"In the movie Star Wars Episode III: Revenge of the Sith Fisto was sliced in the chest. But in the novelisation of the film Anakin Skywalker arrived in the Chancellor's office and found Fisto's head on Palpatine's desk. The optimistic, good-spirited Jedi's severed head was reportedly smiling."